Domestic sewage treatment process capable of improving phosphorus removal quality

Abstract

The invention discloses a domestic sewage treatment process capable of improving phosphorus removal quality. The method comprises the steps of pre-precipitation, synchronous precipitation and post-precipitation; wherein a primary sedimentation tank is arranged in the front sedimentation tank; an anaerobic tank, an anoxic tank, an aerobic tank and a secondary sedimentation tank are arranged in thesynchronous sedimentation tank; a flocculation tank and a contact filtering tank are arranged in the rear sediment. In the domestic sewage treatment process capable of improving phosphorus removal quality, by means of the pre-precipitation process, the total amount of phosphorus in the P-containing raw water is reduced; synchronous precipitation, nitrogen and phosphorus in the sewage are removed;finally, the wastewater passes through a second sedimentation tank for carrying out water-sewage separation on the sewage subjected to nitrogen and phosphorus removal; through the flocculation tank, separated phosphorus ions flocculate and coagulate and then are filtered by contacting with the filter screen in the filter tank, so that biological phosphorus removal is carried out on the P-containing raw water, the phosphorus removal effect is greatly improved, and meanwhile, in the phosphorus removal process, the phosphorus content of the discharged water is greatly reduced by repeatedly and circularly removing phosphorus.

Description

technical field [0001] The invention relates to the technical field of domestic sewage treatment, in particular to a domestic sewage treatment process capable of improving the quality of phosphorus removal. Background technique [0002] Nitrogen and phosphorus in urban sewage mainly come from urban domestic sewage, from agricultural fertilization (nitrogen) and spraying clothing (phosphorus, etc.), and from industrial wastewater. The main hazards of nitrogen and phosphorus: nitrogen and phosphorus can make slow flow such as lakes closed or Semi-enclosed water bodies produce eutrophication, and eutrophication of water bodies has become a major global environmental problem. Biological nitrogen and phosphorus removal, as the main means to solve water eutrophication, has become the top priority in the field of sewage treatment. Phosphorus process, in the process of phosphorus removal, the A2 / 0 process is generally used for nitrogen and phosphorus removal, and organic pollutants ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a domestic sewage treatment process that can improve the quality of phosphorus removal, to solve the problem that the total amount of phosphorus removal in the current sewage phosphorus removal process is not ideal in the above-mentioned background technology

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